-
[1]
A.Barchielli,N.Brambilla and M.Prosperi,Nuovo Cimento,103A(1990)59;R.McClary and N.Byers,Phys.Rev,D28(1983)1692;S.N.Gupta,S.F.Rondford and W.W.Repko,Phys.Rev,D26(1982)3305;Yu-qi Chen and Yu-ping Kuang,Phys.Rev,D46(1992)1165;E.Eichten et al.Phys.Rev,D17(1980)3090;J.L.Richardson,Phys.Lett,B82(1979)272.[2]E.Laermann et al,Phys.Lett,B173(1986)437.[3]Dong Yu-bing,Yu You-wen,Zhang Zong-ye and Shen Pen-nian,BIHEP-TH-93-6.[4]H.Grotch et al,Phys.Rev,D45(1992)4337.[5]P.Mozhay and J.L.Rosner,Phys.Rev,D28(1983)1132;W.Kwong and J.L.Rosner,Phys.Rev,D38(1988)279.[6]M.Narain et al,Phys,Rev.Lett,66(1991)3113.[7]Particle Data Group,Phys.Rev,D4511-2(1992)1.